VSL interfaces down

[Colin Higgins]

We have two new 6513s with two Supervisor 2T modules each. I set them up for quad sup vss sso, and connected the 10Gbs interfaces in a "X" pattern

switch 1 t7/4 --->switch 2 t7/4

swtich 1 t7/5 --->switch 2 t8/4

switch 1 t8/4 --->switch 2 t7/5

switch 1 8/5 ---->switch 2 t8/5

The conversion seemed to go fine, but I now see that only two of the 10Gbs interfaces are active: t7/4 on each side. All the others are down with no link lights (dark).

If I issue the command

sho switch virtual link port-channel

I see

Flags:  D - down        P - bundled in port-channel

        I - stand-alone s - suspended

        H - Hot-standby (LACP only)

        R - Layer3      S - Layer2

        U - in use      N - not in use, no aggregation

        f - failed to allocate aggregator

        M - not in use, no aggregation due to minimum links not met

        m - not in use, port not aggregated due to minimum links not met

        u - unsuitable for bundling

        d - default port

        w - waiting to be aggregated

Group  Port-channel  Protocol    Ports

------+-------------+-----------+-------------------

1      Po1(RU)          -        Te1/7/4(P)     Te1/7/5(D)

2      Po2(RU)          -        Te2/7/4(P)     Te2/7/5(D)

Is there something more I need to do? Something I missed?

[Reza Sharifi · Accepted solution]

Did you also add  t8/4 and t8/5 to the portchannels?

Can you post sh run and also sh etherc summ?

HTH

[Colin Higgins]

I figured out what was wrong: I had the wrong IOS version loaded, and the ICS in each chassis crashed, taking down the port-channel. I booted those blades to the correct IOS version and the channels came back up.